CH 13 COS/HD

Electricity travels how many miles per second?

186,000

Lightning bolts travel through the air at speeds of up to how many miles per hour?

60,000

Unit that measures the strength of an electric current

Ampere

Substances that speed up chemical reactions

Catalysts

Color component within the skin such as blood or melanin

Chromophore

Distilled water is a particularly good conductor.

False: Distilled water is a poor conductor, but the ions in ordinary water make it a good conductor.

Microcurrent travels throughout the entire body.

False: Microcurrent does not travel throughout the entire body; it serves only the specific area being treated.

Normal electric wall sockets that power a hair dryer or curling iron are 220 volts.

False: Normal electric wall sockets that power a hair dryer or curling iron are 120 volts; most air conditioners and clothes dryers run on 220 volts.

There are two types of electric current: direct and converted.

False: The two types of electric current are direct and alternating.

Extremely low level of electricity that mirrors the body's natural electrical impulses

Microcurrent

Currents used in electrical facial and scalp

Modalities

Unit that measures the resistance of an electric current

Ohm

The type of current that should not be used on clients who are pregnant, have high blood pressure, or have a pacemaker is:

Tesla high-frequency

A wall plate is also known as facial stimulator.

True

Electricity does not occupy space or have physical or chemical properties.

True

The heating element in a hair dryer heats up because it is not large enough to carry the electric current.

True

UV prompts the skin to produce vitamin D, a fat-soluble vitamin that promotes mineralization of bones.

True

Ultraviolet A light has the longest wavelength of the UV light spectrum.

True

Rapid and interrupted current that flows in one direction and then in the opposite direction is:

alternating current

The positive electrode is called a(n):

anode

The path of an electric current from the generating source back to the original source is a(n):

complete circuit

A substance that is a particularly good conductor of electricity is:

copper

The process used to treat acne and milia and soften and emulsify deposits in the hair follicles is:

desincrustation

An applicator that directs electric current from a machine to the client's skin is a(n):

electrode

Electronic facial treatments are commonly referred to as:

electrotherapy

The special device that prevents excessive current from passing through a circuit is a(n):

fuse

Rays with long wavelengths that penetrate more deeply and produce more heat than visible light are:

infrared rays

Rubber, silk, wood, and glass are common examples of:

insulators

Infusing water-soluble products into the skin with the use of electric current is known as:

iontophoresis

The electrical appliance connection that supplies current to the circuit is the:

live connection

The current for facial and scalp treatments is measured in:

milliamperes

Lasers work by a process that turns the light from the laser into heat called:

photothermolysis

The negative or positive pole of an electric current is referred to as the:

polarity

Cataphoresis forces acidic substances into deeper tissues using galvanic current from the:

positive toward the negative pole

Electricity is a form of energy that, when in motion, exhibits:

thermal effects, chemical effects, magnetic effects

Rays with short wavelengths that are the least penetrating, produce chemical effects, and kill germs are:

ultraviolet rays

Thermal or heat-producing current with a high rate of oscillation or vibration is:

violet ray

The unit that measures the pressure or force that pushes the flow of electrons forward through a conductor is a(n):

volt

A measurement of how much electricity is being used in 1 second is a(n):

watt

The distance between two successive peaks is called:

wavelength